refactor: rename the theme brand and every identifier from AKSRT to Jio

Full-project rename. `git grep -i aksrt` is now empty apart from the
DBMigrator 3.3.0 changelog note that documents the rename itself.

Code identifiers
- PHP namespace AKSRT\ -> Jio\ (composer PSR-4 + 378 declarations)
- global constants AKSRT_* -> JIO_* (VERSION/DIR/URI, PAY_TYPE_*, CAPTCHA_*)
- procedural functions, hooks, options, meta keys, table names,
  cookies, query vars, ajax actions and nonces: aksrt_ -> jio_
- text domain aksrt -> jio; Theme Name -> Jio
- JS globals: aksrtData/aksrtAdminData/... -> jioData/jioAdminData/...,
  window.AKSRTCaptcha & friends -> window.JioCaptcha, Aksrt* -> Jio*
- Vue components Aks*.vue -> Jio*.vue (15 files renamed + imports)
- CSS classes/data-attrs/custom properties: aksrt- -> jio-
- REST namespace aksrt/v1 -> jio/v1 (incl. payment gateway callbacks)

Storage layer
- DB tables {prefix}aksrt_* -> {prefix}jio_*; SCHEMA_VERSION 3.2.0 -> 3.3.0
  so dbDelta creates the new names on install
- widget id_base aksrt_widget_* -> jio_widget_*
- uninstall.php drop list rebuilt from the actual migrator tables
  (dropped 3 stale entries, added the 17 missing ones)

Removed
- hardcoded https://api.aksrt.com/version.json default update endpoint;
  get_endpoint() now reads the 「更新端点」 setting and do_check() no-ops
  when it is empty

Files renamed: inc/helpers/aksrt-*.php -> jio-*.php (54),
assets/admin/src/components/form/Aks*.vue -> Jio*.vue (15).
Build artifacts regenerated: assets/css/build, assets/js/runtime,
assets/admin/build.

Verified: audit-psr4-paths errors=0, audit-admin-contracts errors=0
(warnings=56, unchanged baseline), 813/813 widget-system tests,
44/44 phpunit, php -l clean across all PHP.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/widget-system/vip-settings-structured-contract.test.cjs

@@ -27,8 +27,8 @@ const paymentRuntime = read('src', 'Settings', 'PaymentRuntime.php');
 const packagesTrait = read('src', 'Content', 'VipServicePackages.php');
 const purchaseSource = read('src', 'Content', 'VipServicePurchase.php');
 const modalSource = read('src', 'Content', 'VipServiceModal.php');
-const rendererVue = read('assets', 'admin', 'src', 'components', 'form', 'AksFormRenderer.vue');
-const fieldVue = read('assets', 'admin', 'src', 'components', 'form', 'AksField.vue');
+const rendererVue = read('assets', 'admin', 'src', 'components', 'form', 'JioFormRenderer.vue');
+const fieldVue = read('assets', 'admin', 'src', 'components', 'form', 'JioField.vue');
 const payVipJs = read('assets', 'js', 'pay-vip.js');
 const vipTabPhp = read('inc', 'helpers', 'user-center-renderers', 'vip-tab.php');
 const homeCms = read('src', 'Settings', 'HomeCms.php');
@@ -146,12 +146,12 @@ test('等级 Tab 标题由显示名称动态驱动', () => {
   // 手风琴：所有 repeater/group 行默认收起，点击标题行展开（按行 key 记录开合）。
   assert.match(fieldVue, /useCollapsibleItems\(\)/);
   assert.match(fieldVue, /v-show="isRepeaterItemOpen\(repeaterDragKey\(element\)\)"/);
-  assert.match(fieldVue, /aksrt-field__repeater-summary/);
+  assert.match(fieldVue, /jio-field__repeater-summary/);
   assert.doesNotMatch(fieldVue, /schema\.collapsible|schema\.defaultCollapsed/);
   // accordion/fieldset 的 sections 分块手风琴。
   assert.match(fieldVue, /const fieldsetSections = computed\(/);
   assert.match(fieldVue, /function toggleFieldsetSection\(index\)/);
-  assert.match(fieldVue, /aksrt-field__accordion-section-head/);
+  assert.match(fieldVue, /jio-field__accordion-section-head/);
 });
 
 test('结构化分组默认收起，标题行带摘要；升级价格按三块手风琴渲染', () => {
@@ -416,7 +416,7 @@ test('tag_class 透传到前端套餐卡与积分兑换弹窗', () => {
   assert.match(payVipJs, /item\.tag_class \|\| "jb-yellow"/);
   // 弹窗时长行按 time/unit 渲染，Permanent 走永久。
   assert.match(modalSource, /\$is_permanent = !empty\(\$package\['is_permanent'\]\)/);
-  assert.match(modalSource, /\$pkg_unit === 'month' \? __\('个月', 'aksrt'\) : __\('天', 'aksrt'\)/);
+  assert.match(modalSource, /\$pkg_unit === 'month' \? __\('个月', 'jio'\) : __\('天', 'jio'\)/);
   // 用户中心档位卡消费续费/升级简介。
   assert.match(vipTabPhp, /\$renew_desc = \(string\) \(\$vip_settings\['renew'\]\['desc'\]/);
   assert.match(vipTabPhp, /\$upgrade_desc = \(string\) \(\$vip_settings\['upgrade'\]\['desc'\]/);
@@ -514,6 +514,6 @@ test('升级价格 sections 能展开成三块手风琴，且块内字段遵循
   assert.match(fieldVue, /const fieldsetSections = computed\(\(\) => \{[\s\S]*?buildFieldsetSections\(props\.schema\)/);
   assert.match(fieldVue, /function sectionFields\(section\) \{[\s\S]*?matchDependency\(field\.dependsOn, props\.modelValue\)/);
   // 结构化分组之间留出间隔，两个分组不会上下贴在一起。
-  assert.match(fieldVue, /\.aksrt-field--group,\s*\.aksrt-field--repeater,\s*\.aksrt-field--accordion,\s*\.aksrt-field--fieldset \{[\s\S]*?margin-bottom: 26px;/);
-  assert.match(fieldVue, /\.aksrt-field__accordion-section \+ \.aksrt-field__accordion-section \{[\s\S]*?margin-top: 14px;/);
+  assert.match(fieldVue, /\.jio-field--group,\s*\.jio-field--repeater,\s*\.jio-field--accordion,\s*\.jio-field--fieldset \{[\s\S]*?margin-bottom: 26px;/);
+  assert.match(fieldVue, /\.jio-field__accordion-section \+ \.jio-field__accordion-section \{[\s\S]*?margin-top: 14px;/);
 });